Emily Zurrer, an Olympic bronze medal winner with Canada's women's national soccer team, was amazed by the talent on stage.

"Gordon Lightfoot and Biebs on the same stage," said Zurrer with the hashtag "#onlyinCanada."

However, the choice of musical acts was criticized by some.

"Is this Hedley or something? When's the football start again," said former CFLer and current bobsledder Jesse Lumsden during the performance by Marianas Trench. "Who ever he is I think he needs to pee."

Jepsen, who scored an international hit with the song "Call Me Maybe" last summer, also drew attention.

"I love how everyone is giving bebs heat right now, leave the kid along he's untouchable in the leather vest!" said Kaylyn Kyle, another player with Canada's women's soccer team. "#deadserious I want it!"

For his part, Bieber ignored the critics.

"(H)onored to perform for my country," said Bieber. "#ProudCanadian . Good luck in the second half. thanks"

"Raise your hand if you stopped watching the Grey Cup after Biebs," said Zurrer. "#every13yroldgirlinCanada #slowlyraisingmyhand.."

During the game's third quarter all 10 trending topics in Toronto were related to the Grey Cup or its halftime show.